Comparison of the ant and the

Description[ edit ] T. Their antennae have 12 segments. Some queens with crushed abdomens still lay eggs, and there are documented instances of T. They also appear highly tolerant to heat and cold.

Comparison of the ant and the

In other words, if you divide the antenna at the center feed point, the 2 halves of the antenna look like mirror images of each other.

Tapinoma sessile - Wikipedia

As it turns out, it is indeed possible to do that. The resulting antenna is normally mounted on or near the ground in a vertical position.

Let's start with a center fed vertical dipole, which was analyzed in a previous section. One way to visualize how to shorten the antenna is to progressively modify it. First we split the wire below the feed point into 4 wires.

Next, keeping the 4 strands evenly spaced, we raise the ends of the wires until they are horizontal. As shown in the following graph, when the "radials" are at 0 degrees, the impedance is about 70 ohms, since we are really dealing with a vertical dipole.

As the radials are raised to an angle of 90 degrees, the impedance drops to around 20 ohms. Notice that when the radials are at an angle of about 45 degrees, the impedance is very close to 50 ohms, which is similar to the inverted Vee. It has already been demonstrated that a vertical dipole is somewhat immune to the effects of a ground on its impedance.

It might be expected that the ground plane vertical would also be immune to the efects of ground. The effects of a real ground on the resonant length and impedance is shown in the following figures.

Even thugh it doesn't look like it, there really are 3 curves on the resonant length graph! As can be seen, neither the resonant length nor the impedance vary dramatically with ground conditions, but the impedance will depend upon the height above ground and range from around 20 to 40 ohms.

It was also shown, however, that the vertical dipole gain depends on the ground conditions.

Carpenter Ants, How To Kill and Get Rid of Carpenter Ants and Wood Ants

By analogy it would be expected that the ground plane vertical would also be affected by the same factors. As the following graphs show, that conjecture would be true. A comparison with the similar graphs presented for the vertical dipole shows that the shape and tendencies are indeed the same. The gain for the ground plane is very nearly constant and equal to an isotropic antenna at low heights and real ground conditions.

Comparison of the ant and the

Meanwhie the take-off angle appears to be in the range of 15 to 20 degrees for most cases at low heights. Note that the better ground conditions give a lower angle. So what can we conclude about the ground plane vertical? In general it seems to behave much as a vertical dipole at a similar height.

Carpenter Ants (Camponotus Modoc)

It's impedance and resonant length variations should make it reasonably simple to tune for resonance and the impedance should present a reasonable match to 50 ohms, even though it is a little low.

In addition, since it can be mounted very close to the ground and provide a reasobably low take-off angle, it should indeed be a reasonable antenna for practical use. Of course, hams have known that for a long, long time. But it is nice to know that the theory agrees with practice.Free download for PushToTest TestMaker open source test platform for Web application testing.

Carpenter Ant Facts. Carpenter ants are one of natures most aggressive wood destroyers. Similar to termites, carpenter ants damage wood.

Carpenter Ant Facts

Unlike termites however, carpenter ants do not eat wood for food. Carpenter ants only bore into wood to establish and/or enlarge their nest. The Pain Management Center at Tor-Vergata University Medical Center (PTV) offers a comprehensive range of services for patients with acute or chronic pain.

comparison | definition: the act of examining resemblances | synonyms: likening, scrutiny, comparing, examination, confrontation, analogy, collation, contrast. Termite Control. With both treatment and preventative services, Terminix ® offers the most advanced solutions to protect your home from termites.

Sep 09,  · MBL Designs & Tfolgirl’s Movie Discussions/Lego Set Comparison: Ant-Man and The Wasp.

3 Easy Ways to Identify Carpenter Ants - wikiHow